Directory traversal vulnerability in inc/includes.inc in GuppY 4.6.3 allows remote attackers to include and execute arbitrary local files via a .. (dot dot) in the selskin parameter to index.php. NOTE: this can be leveraged for remote file inclusion by including inc/boxleft.inc and specifying a URL in the xposbox[L][] array parameter.
Direct static code injection vulnerability in error.php in GuppY 4.5.9 and earlier, when register_globals is disabled, allows remote attackers to execute arbitrary PHP code via the _SERVER[REMOTE_ADDR] parameter, which is injected into a .inc script that is later included by the main script.
Directory traversal vulnerability in error.php in GuppY 4.6.3, 4.5.16, and earlier allows remote attackers to include and execute arbitrary local files via a .. (dot dot) in the id parameter. NOTE: this can be leveraged to bypass authentication and upload arbitrary files by including admin/inc/upload.inc and specifying certain multipart/form-data input for admin/inc/upload.inc.